ICBM address

(Or "missile address") The form used to
register a site with the Usenet mapping project includes a
space for longitude and latitude, preferably to seconds-of-arc
accuracy. This is actually used for generating
geographically-correct maps of Usenet links on a plotter;
however, it has become traditional to refer to this as one's
"ICBM address" or "missile address", and many people include
it in their sig block with that name. (A real missile
address would include target altitude.)